André Rezende Sá (Portuguese pronunciation: [ɐ̃ˈdɾɛ ˈsa]; born 6 May 1977) is a Brazilian former professional tennis player. In singles, he was a Wimbledon quarterfinalist in 2002 and has reached a career-high doubles ranking of World No. 17, winning 11 doubles titles. Sá reached the semifinals of ATP tournaments Memphis and Hong Kong in 2000 and 2001 respectively.

Sá started playing tennis at the age of eight, encouraged by his older brother. At the age of 12 and ranked number 1 in Brazil, he moved to the Nick Bollettieri Tennis Academy in Bradenton, Florida, where he stayed for five years. In 1996, he graduated from Brandenton Academy, where he played basketball for three years.

Sá played his first professional match in 1993, in a Challenger in his hometown of Belo Horizonte, where he lost in the first round at the age of 16. In 1997, he started travelling around South America, reaching his first Challenger Semifinal in Quito, losing to Mariano Puerta. In August, he reached his first final, again in his hometown, losing to the Brazilian Roberto Jabali. He also reached the semifinal in Guadalajara, Mexico. In 1997, he played his first Davis Cup match, against Alistair Hunt, from New Zealand, in Florianópolis, for the World Group Qualifying Round. It was the 5th match of the rubber, with a 5–0 win for Brazil. In October, he played his first ATP-Tour match, in Mexico City, where he reached the quarter-final.

At the beginning of 2000, he reached the final in Waikoloa, Hawaii Challenger and his first ATP semifinal in Memphis, where he lost to eventual winner Swedish Magnus Larsson. He participated in three Grand Slams: Roland Garros (lost 1st round), Wimbledon (lost 1st round) and U.S. Open (lost 2nd round). Sá was part of the Brazilian Davis Cup team that reached the semifinals, losing to Australia 5–0. Sá played the 4th match against Lleyton Hewitt 4–6, 1–6.

Sá's best results were in 2002. Without winning a single title, he reached his career-best ranking, 55, after three excellent ATP results. He participated in all four Grand Slams with a quarterfinal appearance at Wimbledon. He beat Antony Dupuis, Stefan Koubek, compatriot Flávio Saretta and Spain's Feliciano López, but lost in four sets in a three-hour and ten-minute match to home hero Tim Henman, 6–3, 5–7, 6–4, 6–3. Sá won a career-record amount of US$102,198. The following month, he reached the Amersfoort quarterfinal and the Kitzbühel third round, allowing Sá get to 55th place in the rankings.

Sá had a terrible 2003. With 13 first-round defeats on a row, he his first win was at the grass of Queen's, beating Belgium's Gilles Elseneer, but losing at the second round. Sá plummeted on the rankings after a horrible losing streak and only a second round in Wimbledon, failing to retain his points. He dropped to 138th after the British Grand Slam.

2004 was a fine year for Sá, winning two challengers, in São Paulo and College Station. He also reached the Covington final. In 2005, Sá won the Challenger of Campos do Jordão and reached the final in Dallas, along with two other semifinals. In 2006, he reached two Challenger finals in Bogotá and Belo Horizonte, finishing the year with a ranking of 179, as the 5th Brazilian.

Sá was the second last Brazilian to secure his place at the 2004 Olympics, Sá only participated at the Games because another team gave up their spot.[4]

Sá played 17 Davis Cup matches, in 12 ties. He won 10 matches and lost seven. In doubles, he has an impressive record of seven wins and three losses. He was part of the 2000 Brazilian team that reached the World Group Semifinals.